Fireproof floor construction



Dec. 22, 1931. s. MACOMBER FIREPROOF FLOOR CONS TRUQTION 4 Sheets-Sheet1 Original Filed July 8 1926 Dec. 22, 1931. s. MACOMBER FIREPROOF FLOORCONSTRUCTION 4 Sheets-Shet 2 Original Filed July 8. 1926 Dec. 22, 1931.

S. MACOMBER FIREPROOF FLOOR CONSTRUCTION 4 Sheets-Sheet 5 Original FiledJuly 8, 1926 u w w h w TTOENEK Dec. 22, 1931. s, MACOMBER 1,837,367

FIREPROOF FLOOR CONSTRUCTION Original Filed y 8. 1926 4 Sheets-Sheet 4PNEK I the latter are used, there Patented Dec. 22, 1931 STANLEY MAcoBEn, or nnenrrnnn nrsr'nror, srnnr. COMPANY; or onnron, onro,

OHIO, nssrenon TO THE MACOMBER A oonronn'rron or onro V rrnnrnoonrtoonCONSTRUCTION Original application filed ul 8,1926,

" 1928. Serial Thesubject matter of this application has been dividedout'of my pending application Serial No. 121,114, filed July 8,1926;Means forruse in making fire-proof floor'constructions. a 1

This invention relates to reinforced concrete floor systems. Theinvention particularly relates to systems of this character in which aspecial design of joistpcan be utilized for carrying theconstructionlo'ads. The in vention is furtherv designed sothat theconcrete can act as a T-beam and can take the compression stresses asitsets. Either metal or wood forms can be used and in the event is noswelling of the same occasioned whereby concrete iswasted because of theforms takingup concrete nor is there any warping of thewood forms. Theclaims of this application are limitedtothenew and improved fire-prooffloor construction obtained by the use of the forms and constructionmaterials shown in the; accompanying drawings and hereinafter fullydescribed. I provide means whereby a temporary support which is utilizedfor carrying the. forms can be left inthe concrete so as to becomepart'of the metal reinforcement of the floor. These supportsarecomprised of end and central spacing barsand suspension rods and in;termediate suspension yokes. The design obviates the necessity ofshoring, saves considerable time in construction and enables the pouringof the concrete for the top floor first, if desirable.

The annexed drawings'and the following description set forth in detailcertain means embodying my improvedfire-proof floor, construction, andthe forms and construction materials utilized in forming said floorconstruction, such disclosed means, however, constituting but a-few ofthe various forms in which the principle of the invention may beembodied.

In said annexed drawings:

Figure 1 is a plan view of a fragmentary portion of the supports andforms forforming my improved reinforced'floor construction, certainparts being broken away to disclose certain underlying parts, as will behereinafter fully explained;

Serial no. 121,114. Divided and. this application filed February '7,

Figure 2 is a-transverse vertical section, taken in theplane indicatedby the line HII, Figure 1; I p a Figure 3 is a fragmentary transversevertical section, upon an enlarged scale, taken in.

the plane indicated by the line III-III, Figures 1 and 6; a Figure 4 isa fragmentary transverse verti cal section upon the same scale as thatof Figure 3, taken in the planeindicated by the line TV-IV, Figures 1and 6;

Figure 5 is a fragmentary longitudinal vertical section, upon the samescale as Figures 3 and 4', taken in the planes indicated by the line VV,Figurel and Figure 6 is a fragmentary plan view, upon the same scale asthat of Figures 3, 1 and 5, of a part of the elements shown at thelefthand end of Figure 1,-the view being taken from the positionindicated by the line- V IVI, Figure 2. 7 Referring to' the annexeddrawings in whlch the same parts are indicated by the same respectiveordinals in the several views,

a main floor'girder is indicated by the ordlnal 1 which is adapted to besupported by concrete or steel columns.

The girders 1 V serve as main spaced longitudinal supporting members.Upon these girders 1 areisupported a plurality of spaced transversejoists 2',the latter in the form of construction shown and describedbeing a special type of bar joist described and claimed :by me in myUnited States Letters Patent No. 1,651,032, serving as longitudinalreenforcement bars, and being mounted upon these joists 2 are spacerbars Bformed along their lower edges with spaced recesses or notches ea-11d along their upper edges with spaced recesses or notches 5. Thenotches 1 furnish means for aligning the spacer bars 3 at the properdistances apart upon the joist 2, the upper chord 30 of the latter beingreceived by the lower bar notches 4t. 5 The upper bar notches 5,:

which are disposed adj acent to and upon opposite sides of the joists 2,receive the upper bent ends of hook bolts 6 which support concrete formshereinafter fully described. The

hook bolts 6 dependfrom the longitudinal bars 3 and serve asreinforcement members, as hereinafter fully described. Forms areprovided for the joist 2 comprising pans or troughs 9 which surround thejoist 2 and are formed with upper flanges 9 which receive the lowerthreaded ends of the hook bolts 6, nuts 8 providing means by means ofwhich the joist form pans 9 are supported at the desired height by thebolts 6. The spaces between the flanges 9' of the adjacent joist pans 9are filled by plates 10 which are formed with strengthening ribs 11.

Supported from the bottom of the joist forms 9 are girder forms 12formed with upper flanges 15 which are secured to the joist )ans 9 bymeans of bolts 13 and nuts 14. The extreme outer edges of the flanges 15of the girder forms 12 are formed with upwardlyturned lips 16, Figures 3and 5, the purpose of which will be hereinafter fully described. Inorder to close the ends of the spaces between adjacent joist forms 9,and above the girder forms 12, I provide end caps 17 having upper andlower flanges 18 and 19, respectively, and side flanges 17. The sideflanges 17 do not extend quite to the upper corners of the end caps 17but the flanges are shortened and the corners are notched, as indicatedby the ordinal 17 Figure 3, indicating the top of the side flange 17,and the ordinal 17 indicating the space between the top of this flange17 and the adjacent end of the top flange 18, this space 17 beingconsiderably enlarged to provide play and to allow for the nut 8 and theslant of the mold 9. The end caps 1'7 are fitted between adjacent joistforms 9 on the sides and between the covers 10 and the girder forms 12on the top and bottom, respectively, and are lim ited in their inwardmovement by the stop lips 16 formed on the flanges 15 of the girderforms 12.

Three of the spacer bars 3 are ordinarily provided for each bay of thebuilding, one at each end and one in the center, and other supports areformed for the joist forms 9 intermediate adjacent spacer bars Thescother supports comprise spaced yokes 20 which are supported upon theupper chord 30 of the joist 2 and are secured to the flanges 9 of thejoist forms 9 by means of nuts 21. These yokes 20 also serve asdepending reinforcement members. The bottom chord of the supportingjoist is indicated by the ordinal 31 and an end plate 32 of the joist isshown connected at one end, Figure 3, by means of a tie-plate 28 to avertical member 25 which is formed with a bottom flange 26 secured to aflange 15 of the girder form 12, and with a top strengthening flange 27.It will be noted that the plate 25 extends in height somewhat above theplane of the top chord 30 of the joist 2, or slightly above the desiredheight of the concrete floor. The

purpose of the construction illustrated by the member 25 with flanges 2Gand 27 is to illustrate the closing up of a portion of the constructionwhere no floor is to be laid, as, for instance, an elevator well. Theends of the joist 2 are framed in the masonry wall 24, Figure 2, bymeans of corbelled recesses 23 for receiving concrete to elfect thisframing, in combination with the extension of the hearing plate 29 ofthe joist 2.

From the description heretofore given, in combination with theaccompanying drawings, it will be evident that after the elements havebeen assembled in the manner described, the concrete can be poured andthat the same will flll the joist forms 9 and flow over the covers 10to'form concrete joist and intermediate flooring and will also flow intothe girder forms 12 and fill up the space between the end caps 17 toform concrete girders and complete the concrete floor, with the spacedtransverse joist 2, the longitudinal spacer bars 3, the depending hookbolts 6, the depending yokes 20, and the spaced longitudinal girders 1forming the metal reinforcement. Now, when it is desired to remove theforms, it is necessary only to take out the bolts 13, it being noticedfrom an inspection of Figure 3, for instance, that the nuts 14 are putupon the top ends of the bolts 13, and take down the forms 12, and thento remove the nuts 8 and 21, whereupon the joist forms 9 can be removed,the supporting features thereof'including the spacer bars 3, hook bolts6, yoke supports 20 and nuts 14, being left in the concrete to form partof the metallic reinforcement.

What I claim is:

1. In fire-proof floor construction, the combination of longitudinalgirders; spaced transverse joists supported'thereon; spaced longitudinalreinforcement bars mounted on said joists; spaced dependingreinforcement members supported by said joist-s throughout the length ofthe latter; spaced reinforcement members depending from saidlongitudinal bars adjacent to and upon opposite sides of said joists,respectively; concrete beams enveloping said girders and joists; andconcrete enveloping said reinforcement bars and reinforcement membersand filling the spaces between the tops of said joists to form anunbroken floor body and surface.

2. In fire-proof floor construction, the combination of main spacedsupporting members; spaced tension members mounted upon the latter andextending in a direction divergent thereto; spaced longitudinalreinforcement bars mounted on said tension members; spaced dependingreinforcement members supported by said tension members throughout thelength of the latter; spaced reinforcement members depending from saidlongi- STANLEY MAOOMBER.

CERTIFICATE OF CORRECTION.

Patent No. 1,837,367. Granted December 22, 1931, to

STANLEY MAGOMBER.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 1,line 86, beginning with the word serving" strike out all to andincluding the numeral "3" in line 88, and insert instead and serving astension members. Mounted upon these joists 2 are spacer bars 3, servingas longitudinai reinforcement bars, and being; and that the said LettersPatent should be read with this correction therein that the same mayconiorm to the record of the case in the Patent Office.

Signed and sealed this 16th day of February, A. D. 1932.

. Ms J. Moore, (Seal) Acting Commissioner of Patents.

